EP 1493737 A1 20050105 - Process for producing a pyran compound
Title (en)
Process for producing a pyran compound
Title (de)
Verfahren zur Herstellung einer Pyranverbindung
Title (fr)
Procédé de préparation d' un compose du pyran
Publication
Application
Priority
- JP 2003270904 A 20030704
- JP 2003316531 A 20030909
- JP 2003411432 A 20031210
- JP 2003422708 A 20031219
- JP 2003422709 A 20031219
Abstract (en)
The invention relates to a process for producing a mixture of a pyran represented by the formula (II) and a hydroxypyran represented by the formula (III) by reacting aldehyde (I) with isoprenol. R<sup>1</sup> ―CHO (I) wherein R<sup>1</sup> represents an alkyl or alkenyl group having 1 to 12 carbon atoms, an optionally alkyl- or alkoxy-substituted aryl group having 6 to 12 carbon atoms in total, or the like. Further, the hydroxypyran compound in the resulting mixture is subjected to dehydration reaction in the presence of an acid to produce a pyran compound represented by the formula (II).
IPC 1-7
IPC 8 full level
C07D 309/08 (2006.01); C07D 309/18 (2006.01)
CPC (source: EP US)
C07D 309/08 (2013.01 - EP US); C07D 309/18 (2013.01 - EP US)
Citation (search report)
- [XD] CH 655932 A5 19860530 - FIRMENICH & CIE
- [X] JP H08127577 A 19960521 - KURARAY CO
- [XD] US 3681263 A 19720801 - LINDE LEENDERT MAARTEN VAN DER, et al & PATENT ABSTRACTS OF JAPAN
Designated contracting state (EPC)
CH DE ES FR GB LI
DOCDB simple family (publication)
EP 1493737 A1 20050105; EP 1493737 B1 20060906; CN 100404522 C 20080723; CN 1590384 A 20050309; DE 602004002245 D1 20061019; DE 602004002245 T2 20070405; ES 2271740 T3 20070416; US 2005004210 A1 20050106
DOCDB simple family (application)
EP 04015753 A 20040705; CN 200410055045 A 20040702; DE 602004002245 T 20040705; ES 04015753 T 20040705; US 87838904 A 20040629